Hydraulic valve and operating means therefor



March 10, 1925- 1,529,218

- P. SANDWELL HYDRAULIC VALVE AND OPERATING MEANS THEREFOR Filed March13, 1924 2 Sheets-Sheet 1 INVENTOR E FERcY SANDWELL ATTORNEYS March 10.1925- 1,529,218

P. SANDWELL HYDRAULIC VALVE AND OPERATING MEANS THEREFOR Filed March 13,1924 2 Sheets-Sheet 2 5o 64 49 65 I I 60 ZI.Z.

E INVENTOR PERCY SAND'WELL BYfilum l g TOR NE YS Patented Mar. 10, 1925.

UNITED STATES PATENT OFFICE.

PERCY SANDWELL, OF POWELL RIVER, BRITISH COLUMBIA, CANADA, ASSIGNOR OFONE-SIXTH TO WILLIAM BRUCE ZUMWALT, AND ONE-SIXTH TO HENRY ANDREWMOILLWAINE, BOTH OF POWELL RIVER. BRITISH COLUMBIA, CANADA.

HYDRAULIC VALVE AND OPERATING MEANS THEREFOR.

Application filed March 13, 1924. Serial a... 699,181.

To all whom it may concern:

Be it known that I, PERCY SANDWELL, a subject of the King of GreatBritain. and a resident of Powell River, in the Province of BritishColumbia, Canada, have invented certain new and useful Improvements inHydraulic Valves and Operating Means Therefor, of which the following isa specification.

My invent on relates to improvements in hydraulic valves and operatingmeans therefor, and the object of the invention is to provide meanswhereby the admission of liquid to a stock tank or the like beneath theliquid level may be automatically controlled to maintain a constantlevel therein. A further object is to provide manually actuated means atthe supply valve and at a point remote therefrom whereby the supplyvalve may be opened or closed. The invention consists essentially of amain supply valve normally opened and closed by fluid pressure suppliedthereto from a suitable source, a float operated piston valve which isadapted to convey the pressure as required to open or close the mainvalve and a remote control valve between the float valve and the mainvalve whereby the latter may be independently actuated, as will ,be morefully shown in the following specification, in which Fig. 1 is a generalview of my invention.

Fig. 2 is a sectional view of the remote control valve taken on the line22 of Fig. 3.

Fig. 3 is a sectional view taken on the line 3-3 of Fig. 2.

Fig. 4 is a sectional view of the main supply valve.

Fig. 5 is a view showing the manner in which the float cord is securedto the sheave of the float operated piston valve.

In the drawings like characters of reference indicate correspondingparts in each figure.

My invention is particularly adaptable for use in connection with astock tank such as is usedin paper mills where the liquid is suppliedinto the tank beneath the liquid level, and the discharge takes placeover an end gate.

The numeral 1, see Figs. 1 and 4, indicates generally the supply valvewhich has a cylindrical-body 2 terminating at its outlet end with a.flange 3 and at the opposite end with a flange 4. Intermediately of thelength of the body 2 is an internal annular flange 5 which forms acylinder head for the annular cylinder portion indicated by the numeral6. Secured to the flange 4 is an annular flange 7 which forms an opposmgcylinder head to the internal flange 5 and which carries an inwardlyprojecting sleeve 8 the outer end of the sleeve being provlded with aflange 9 for connection-to the feed pipe 10, the inner end of the sleeve8 forms an inner wall to the annular cylinder 6.

The numeral 11 is a flanged connection to the tank 12 which is connectedthrough to the flange 3 of the valve body 2. 13 is a cone shaped endclosure supported concentrically within the valve body, and spaced fromthe side walls are a plurality of radially disposed webs 1 1 which arecarried.

at their outer extremities by a flange 15, the flange being held inposition between the flanges 3 and 11. 16 is a circular recess in theend closure 13 extending from the apex in the direction of flow. 17 is avalve seat formed upon the periphery of the end closure 13.

The numeral 18 indicates a valve sleeve which is adapted for endwisemovement within the valve body 2 and efl'ects a closure between theinwardly projecting sleeve 8 and the end closure valve seat 17, at theinlet end of the sleeve 18 is an annular piston 19 which is in contactwith the sleeve 8 and the valve body 2 and is movable endwise betweenthe flanges 5 and 7 20 indicates a plurality of radially disposed spokesconnected at their outer ends to the inner periphery of the valve sleeve18 and at their inner ends to a tubular guide 21 which is longitudinallymovable within the recess 16 of the end closure. 22 is a fork mountedupon the guide 21. The numeral 23 indicates a transverse shaft suitablyjournalled in opposite side walls of the sleeve 8 which is providedoutside the valve body with an operating lever 24 (see Fig. 1) andinside the sleeve 8 with a crank 25, 26 is a crank pin.. 27 is a linkconnected at one end to the crank pin 26 and at the opposite end to thefork 22 by a pin 28, by which an operating connection is establishedbetween the lever 24 and the valve sleeve 18.

The numeral 29 indicates a pair of pet cocks connected to opposite endsof the annular cylinder 6 and preferably dis osed on the underside ofthe valve, by whic the water pressure on either side of the annularpiston 19 may be relieved when it is desired to operate the valve 1 bymeans of the hand lever 24. The numeral 30 indicates a pair of portsleading from the pressure suppl pipes31 and 3-2 to the cylinder 6 bywhic fluid pressure is admitted to and relieved from opposite sides ofthe annular piston 19, whereby the valve sleeve 18 is moved towards orfrom the valve seat 17.

The numeral 33 (see Fig. 1) indicates a float operated pilot valve ofany desired piston type to which is connected a fluid pressure supplypipe 34, a discharge pipe 35 and alternate lead pipes 36 and 37, thenumeral 38 indicates a rope quadrant which is suitably journalled abovethe valve 33 and is coupled to the piston 39 thereof. The quadrant 38(see Fig. 5) is provided with a rim 40 having side flanges 41 and atread formed with a plurality of segments 42 which are spaced anappreciable distance apart and between the ends of which are providedsubstantially half round bars 43 connected at opposite ends to the sideflanges 41 to define pairs of spaces 44 through any of which a bight ofthe rope 45 may be taken for the purpose of providing a frictional gripthereto.

The numeral 46 (see Fig. 1) indicates a counterweight from one end ofthe rope 45, and 47 is a float upon the oppositeend thereof which risesand falls with the liquid in the tank 12 thereby actuating the piston 39of the valve 33 to admit fluid pressure through either the pipes 36 and31 to close the main valve 1, or the pipes 37 and 32 to open it. 4

Interconnected between the pipes 36 and 37 and the pipes 31 and 32 is aremote control valve generally indicated by the numeral-48, (see Figs. 2and 3) of which 49 is the body having a central recess 50 and aplurality of ports which communicate between the various pipes and therecess 50, the ports are indicated b the numerals 51, 52, 53, 54, and56, within the recess 50 is a rotatable valve plug 57 having a stem 58and an operating handle 59, 60 and 61' indicate passages through theplug which normally, or when the system is controlled by the float valve33, register respectively with the body ports 51 and 52 and with 53 and54. The numeral 62 indicates a poripheral passage registering normallywith the port 55 only. 63 indicates a pair of passages formed in theperiphery of the plug and extending from above its longitudinal centreto the base thereof and are at all tiines 2 in register with the base ofthe recess 50,

the outlet dischar 0 port 56 and the discharge pipe 64. he numeral 65indicates a fluid pressure supply pipe connecting with the port 55 bywhich the valve 1 is controlled by the medium of the remote contro valve33. The float on rising to a predetermincd level causes water to flowfrom the pressure supply pipe 34-: through the valve 33, the pipe 36,through the ports 51 and 52 and the passage 60 of the valve 48 throughthe pipe 31 into the cylinder 6 where its pressure is exerted upon thepiston 19 closing the valve, the water on the opposite side of thepiston being free to escape upwards through the pipe 32, the ports 54and 53 and the passage 61 of the valve 48, thence through the pipe 37through the pilot valve 33 and the discharge pipe 35 thereof into thetank 12. The falling of the float below a predetermined level causes thewater from pipe 34 to pass through the valve 33 into the pipe 37 andthence in an entirely opposite direction throughout the system openingthe valve 1, the discharge from the cylinder passing from pipe 36through the pilot valve 33 and the discharge 35 as in the closingoperation.

In the operation of the system by the remote control valve 48 a movementof the lever 59 in a clockwise direction brings the plug of the valveinto a position where the pressure suppl fluid asses through port 55thence circum erentia y of the plug along the passage 62 out throughport 52 to the pipe 31 to close the valve 1, the discharged fluidtherefrom being brought upwardsthrough pipe 32 through the port 54thence longitudinally of one of the passaagles 63 to the base of therecess 50 from w ence it passes through the port 56 in the centre of therecess and out through the discharge Tt will be noted that during theoperation of the remote control valve the ports 51 and 53 are out ofregister with the plug passages 60 and 61 so that there is no flowthrough either of the pipes 36 and 37 or the pilot valve 33.

By moving the lever 59 in an anti-clockwise direction the peripheralpassage 62 of the valve plug registers with the pressure supply port 55an the port 54 to the pipe 32, and that the discharge flow from the mainvalve cylinder through pipe 31 passes through the control valve port 52through one of the' assa 63, under the base of the plug and t roug thedischarge port 56 and pipe 64, causing-the opening of. the main valve.

From the foregoin it will be seen that I have invented a hy raulic valvewhich is automatically operated and which can be controlled at anydesired point remote therefrom.

What I claim as my invention is:

1. In a device of the class described comprising a main valve, a pistonvalve by which fluid pressure is admitted to o n or closesaid valve anda rope suspend float actuating said piston valve, a rope sheave having atread comprising segments s aced apart and means dis osed between saisegments for frictions ly gripping the float rope.

2. In a device of the class described comprising a main valve adapted tobe opened or closed b fluid pressure a ainst a piston therein an a floatoperated piston valve having flow and return ipes through. which thepressure is supplie to and discharged from o posite sides of the pistonof the main va ve, a manually operated valve interposed between thepiston valve and the main valve having an independent fluid pressureinlet and a fluid discharge outlet and means permitting an unrestrictedflow of fluid through vsaid valve and flow, and return pipes to and fromthe main valve while the flow is shut off from the independent fluidpressure inlet anddischarge outlet of said manually operated valve.

3. In a device of the class described comprising a main valve adapted tobe opened or closed by fluid pressure a ainst a piston therein and afloat operate piston valve having flow and return ipes through which thepressure is supplie to and dlscharged of the manually operated valve toeither side of the main valve piston and the return from the oppositeside thereof through the discharge outlet of the manually operatedvalve. 7 v v 4. The combination with a liquid containing tank having asupply inlet beneath the li uid level, of a valve controlling theadmission of liquid through the supply orifice adapted to beautomatically operated by the rise and fall of the liquid in the tankand manually operated adj acent to the valve, and manually operatedmeans for controlling the valve from a point remote therefrom.

Dated at Powell River, B. (3., this 26th day of February, 1924.

PERCY SANDWELL.

Witnesses: Y

R. D. Scorrr, R. A. BAKER.

